The area under the curve to the left of z = -2 was found to be 0.0228 and the area under the curve to the left of z = -0.75 was found to be 0.2266. The area under the curve between these two values will be the difference of the larger area minus the smaller area. Therefore, the desired probability that a student will complete the exam in more than 60 minutes but less than 85 minutes is calculated as follows. P(60 < x < 85) = P(-2